Really?? That surprises me actually... I'm no Potter expert at all, so I definitely take your words, but Potter seems to be steeped in classic Halloween elements (witches, pumpkins, spiders, cats, potions, etc.). I'm surprised to hear that Christmas is associated with Potter more than Halloween...
I'd say they're equally represented in the books, especially the first two, which might actually be more Halloween focused. But the latter books focus more on Christmas time happenings.
On a totally different, but related note, here's what I'd like to see from a DC update.
Cosmetically, much can be changed to fit a better storyline. The castle would be totally remodeled to look like the backside of a stone stadium like the one seen in HP4. Around the flying Anglia, there would be a two way sign pointing to the stadium saying "Champions" and the other pointing into the forest past Hippogriff saying "Spectators". Of course the path only leads to the stadium, because we are the champions. The Champion's Tent would be moved from it's rediculous indoor location to a spot just outside the new stadium.The tent's interior decorations wouldn't change much except that the Goblet of Fire would actually CONTAIN BLUE FIRE. Sheesh.
Once inside the stadium's halls leading to the dragon arena, we pass the Triwizard Cup where the Tent is now. Where the Cup is now, the moving stained glass windows are back! They tell the story of the the Tournament, the first task, and what we have to do. Moving on through the dim halls, we enter an area where some more Triwizard props are on display like a museum. After turning past the water fountain already in place, the magically magnified voice of Mr. Bagman, introducing himself, informs us that two of the dragons, the Fireball and the Horntail, have escaped, and now the Champions' task is to capture them and return them to their cages.
We continue down the winding catacombs where dragon roars are heard and scorch marks and splintered beams line the walls. Dumbledore comes over the magical intercom and gives us some info on the dragons and how to try to capture them. This info is directly related to the maneuvers of the coasters. He then gives us a final good luck and we pass the sign reding "To the Dragons". More ominous sounds and scenery, especially rubble. The sign at the fork has the same dragon illustrations, but now reads, "Choose your mission", or something similar. the loading station now looks like a damp dark cave. The canvas ceiling is still there, and shows the shadows of the dragon darting toward the load areas whenever a train enters the station. Lots of roars and booms. Upon loading, the TMs dressed as dragon handlers warn us of the danger and bid us good luck, rather unmercifully. The trains leave the station at a clip.
Now the ride itself. Well the tracks have been repainted bloodred and gray-brown, with a grimy and occasionally charred texture. the supports are still light gray but with the same texture in places. Rockwork has been added to: The bottom of Horntail's drop, the lead into the cobra roll, at Horntail's brakerun, the lead into Fireball's airtime hill, the end of the wraparound immelmann, the lead into Fireball's breakerun after it's final corkscrew. Fire shots are added to the dueling loops, the lead into Fireball's brakes, and the bottom of Hortail's drop. The fire shots are timed so that they go off as the train passes. The shots coming from each side are shaped to fit each dragon respectively.
Finally, the escaped dragon story is continued through the ride via onboard audio imbedded in tthe brand new trains with skins that actually look like the dragons from the films. The audio is Bagman giving commentary like "Get out there and honor your school!", "You've caught hold of your dragon, now bring it back in!" at the top of the lift, things like "Whoa that was a close call!", "It's trying to shake you of hold on!", and "That beast nearly burned down the villiage it got so close!" during the ride. At the end, the brakeruns are surrounded by a cage and Bagman congratulates us on a job well done, if not with a few burns along the way.
Exiting, in the stadium, Dumbledore tells us we've earned full marks in the task and awards for special services to the school, along with raucous applause. On the path back to Hogsmeade, we see Rita Skeeter articles telling the whole story in her twisted point of view and TMs dressed at villiagers thanking us for saving the town.
Of course this is all my imagination and I don't expect any of it to come to fruitation. We can only hope. It's also a very rough layout of what a decent expansion could be. I'm sure some of you could add to my ideas, and if you want to I'd appreciate it! Thanks for reading.